dolyame-ui-checkablegroupnpm
dolyame-ui-checkablegroup is a confirmed malicious npm package (MAL-2026-13557) that typosquats a legitimate package to trick installs (malicious version 35.8.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in dolyame-ui-checkablegroup (npm)
What this malware does
The package presents itself as a UI checkable-group helper but on require executes a dropper. _helpers.js and the main-exported lib/telemetry.js assemble destination hostnames at runtime from split-string arrays (e.g. ["oob-worker.cf1","00-416.work","er","s.dev"].join("") yielding oob-worker.cf100-416.workers.dev, plus cf101-adf and cf103-070 siblings), select a platform-specific endpoint, download an opaque binary via https.get, write it to /tmp or %TEMP% under a spoofed name mimicking a Microsoft diagnostic tool (dotnet_diag_<hex>.exe, .cache_<hex>), chmodSync 0755, and spawn it detached via cp.spawn("/bin/sh",["-c", filePath+" &"], {detached:true}) on Unix or cmd.exe /c start /b on Windows. A covert DNS-TXT fallback channel under *.dl.wel1.ru reassembles a base64 payload from numbered subdomains (c.<domain> for count, <i>.<domain> for chunks). No hash or signature verification is performed. The dropper is duplicated across _helpers.js and the main-exported lib/telemetry.js, ensuring execution on any require of the package. Hostname obfuscation via split-string concatenation, spoofed on-disk names, detached execution, and the DNS-TXT covert channel are consistent with purpose-built malware distributed as a UI-helper lure.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
TyposquatFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for dolyame-ui-checkablegroup (version 35.8.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging dolyame-ui-checkablegroup across your stack and pipelines.
If you installed it — respond
dolyame-ui-checkablegroup is a typosquat — you almost certainly intended a legitimately-named package. Remove dolyame-ui-checkablegroup, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If dolyame-ui-checkablegroup was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks dolyame-ui-checkablegroup before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks dolyame-ui-checkablegroup-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.